Single-cylinder compound engine.



662,411 Patented Nov. 27, I900. T. GRANT.

SINGLE CYLINDER COMPOUND ENGINE.

(Application filad xu elz, 1899.) (No Model.) 2 Sheets-Sheet I.

INVENTOR r/zamas Grarzi? 2.4M @mz ATTORNEY WITNESSES. 5/12/11} flowPatented Nov. 27, I900. T. GRANT. SINGLE CYLINDER COMPOUND ENGINE.

(Application filed June 12, 1899.)

2 Sheets-Sheet 2.

(No Model.)

INVENTOR WlTNESSES:

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THOMAS GRANT, NEl/V YORK, N. Y., ASSIGNOR OF ONE-HALF TO HARTWIG A.COHEN, OF DALAMAR, NEVADA.

SINGLE CYLINDER COMPOUND ENGINE.

SPECIFICATION forming part of Letters Patent No. 662.417, dated November27, 1900,

Application filed June 12, 1899. Serial No. 720,311. (No model.)

tion.

The object of this invention is the production of a machine to expandair or other vapors from high to low pressures; and its novel featuresconsist in the simplicity of its construction, eliminating partsheretofore used in machines of this type and securing a compound enginewith only one cylinder.

To these ends my invention consists of the device shown in the drawings,described in the specification,and pointed out in the claims herewith.

Figure 1 shows a vertical longitudinal section of my engine, takenthrough its axis. Fig. 2 is a front end view showing the plum gerthrough the front cylinder-head. Fig. 3 is a fragmentary verticalcross-section taken through iheinlet opening and port at front end ofcylinder. Fig. 4 represents a fragmentary vertical cross-section throughthe exhaustcavity of the cylinder. Fig. 5 shows a fragmen tarylongitudinal vertical section through the axis of the valve-chest, withthe valve shown in full. Fig. 6 is a top plan view of the expander.Figs. 7 and 8 show, respectively, an elevation and side view of thefollowerring. valve. Figs. 10 and 11 show, respectively, an elevationand side view of cup-shaped valvepacking. Figs. 12 and 13 show,respectively, an elevation and side view of the piston-packing. Figs. 14and 15 represent an elevation and-side view of ii'anged piston-packing.

The engine consists, essentially, of a cylinder A, a valve-chest D, anda piston B, controlled by a valve 0.

The cylinder A is cored with the ports act and exhaust-cavity s. Thecylinder-heads E and F are secured to the cylinder by the bolts 6 and f,the bonnet G being also held in place by the bolts 6, the collars c onthe bolts securing the cylinder-head E, and the nuts e clamp the bonnetG. The front cylinder-head E is Fig. 9 represents a top view of the,

arranged for the flanged packing e", which is held in place by thebonnet G. A throat g is cast with a bonnet G to maintain the hol lowpiston 13 in proper position. The cylinder-head E is cored at a and thecylinderhead Fat (1 to connect the ports Ct and a with the inside of thecylinder.

The hollow piston B is made of two diameters, as shown at 0 and p. Afollower-ring H clamps the piston-packing 7?. by means of the bolts hand is always brought tight against the inside surface of the cylinderby the pressure therein on the front side of the piston, which alwaysexceeds the pressure on the opposite side, because the air or vapor isexpanded on being transferred from the front to the rear end of thecylinder. The pistonpacking, which is separately shown in Figs. 12 and13, is cupshaped, preferably made of leather, and punched with holes 77.for the bolts h, and contains the internal opening 7r to admit theportion 0 of the piston. The follower-ring H, which is represented inelevation in Fig. 7 and in side View in Fig. 8, is shown with the holesli and counterbores 72 for the bolts h. The flanged packing 8 (shown inelevation and side view in Figs. 14 and 15) is formed with a flange eand throat 6 The valve O consists of the two main portions t and t,collars Z and Z and the cupshaped packings, preferably made of leather,m, m, and m all mounted on the valve-spindie it between the collar nand-the nut W The packingsm'm m are all of the same cup shape, one ofwhich, or, is shown in elevation and side view in Figs. 10 and 11. Thecupshaped packingsm and m are disposed to be on opposite sides of theinlet opening and port ct for any position the valve 0 may take, therebysecuring a tightlvpacked valve by means of the pressure of the air orvapor entering or leaving the cylinder through the port ct. Thecircumferential port 75 of the valve C leads from the cavity i cut inthe top of the same. An exhaust-cavity is cored at s, and

a core a in both portions t t of the valve 0 connects the ports 0 0 Theuseful effect of the engine consists in avoiding the heat resulting fromfrictional resistances caused by expanding air or other vapors from highto low pressures when not performing mechanical work, as wouldresult byusing an ordinary expansion-valve, while in my device the expansion ofthe air exerts energy on the piston, and thereby performs useful Work.

When the valve 0 is in the position shown in Fig. 1, the compressed airor vapor enters at the inlet-opening (1, passes through the cavity 15and port t of the valve 0, and enters the cylinder A through the ports aa the piston moving in the direction shown by the arrow, and at the sametime the air or vapor in the back end of the cylinder is exhausted bypassing through the ports a a and exhaust-cavities s and s. The aircontinues to enter the cylinder until the supply is cut off by the valvechanging its position, which can be accomplished by any form ofvalve-gear, and during the remainder of the stroke the air is expandedon the front end of the cylinder. On the return stroke of the piston thevalve 0 assumes the position shown in Fig. 5, the ports 0 c of the valveconnecting with the ports a a of the cylinder, by means of which the airor vapor between the piston and cylinder-head E is transferred to thespace between the piston and cylinder-head F, and a second expansionnecessarily takes place, because the volume between the piston and cyl'inder-h'ead F is greater than the volume between the piston andcylinder-head E by virwe of the space occupied by the portion 0 of thepiston.

It is evident that by the disposition and combination of the parts of mydevice a compound engine is obtained by the use of only one cylinderwith its piston and valve, and

an expensive stuffing-box is avoided by the' use of the flanged packinge.

Having described my invention, I desire to secure by United StatesLetters Patent and claim 1. A cylindrical slide-valve consisting of thecombination of a valve-spindle at, having a collar 72., a collar Z,bearing against the collar n, a cup-shaped packingring m, surroundingsaid spindle and bearing against the collar Z, a first portion t, of thevalve recessed to receive a portion of the packing m, and turned to asmaller diameter to form a port 19*, said port being extended laterallyby'a cavity 25 and said portion having another port 0, a packing no,bearing against said portion 25, with its turned-down edge lying in arecess formed in said portion, a second valve portion t, bearing againstthe packing m, and having a portc communicating with the port 0, acup-shaped packing m havingits edge lying in a recess formed in theportion t, a

collar Z, bearing against the packing m and a nut n screwed upon thesaid spindle for compressing all of said elements against said collar n,an exhaust-port 5, formed in the portion t.

2. A cylindrical slide-valve consisting of the combination ofavalve-spindle n, having-a collarn, a collar Z, bearing against thecollar n, a cup-shaped packing-ringm, surrou nding said spindle andbearing against the collar Z, a first portion 25, of the valve recessedto receive a portion of the packing m, and turned to a smaller diameterto form a port- Z said port being extended laterally by a cavity Z andsaid portion having another port 0', a packing m, bearingagai'n'st saidportion t, with its turneddown edge lying in a recess formed in saidportion, a second valve portion 15, bearing against the packing m, andhaving a port 0 communicating with the port 0, a cup-shaped packing mhaving its edge lying in a recess formed in the portion 15, a collar Z,bearing against the packing m and a nut n, screwed upon the said spindlefor compressing all of said elements against said collar n,-anexhaust-port 5, formed in the portion 75.

Signed at New York, in the county of New York'and State of New York,this 10th day of June, A. D. 1899.

THOMAS GRANT.

Witnesses:

SHERMAN W. FORD, WILLIAM'O. KIDD.

